Removal of Ferrous Sulfide Deposits

1,151,649. Cleaning ferrous surfaces. DOW CHEMICAL CO. Oct. 17, 1967, No. 47177/67. Heading C7E. Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compou...

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1. Verfasser:	FRED NORMAN TEUMAC
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
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creator	FRED NORMAN TEUMAC
description	1,151,649. Cleaning ferrous surfaces. DOW CHEMICAL CO. Oct. 17, 1967, No. 47177/67. Heading C7E. Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compound selected from thiourea, 1, 3 dimethyl thiourea, 1, 3 diethyl thiourea, alkyl thiourea, ethylene thiourea, 1, 3 diisopropyl thiourea, the thiorea compound being present in an amount equivalent to an amount of thiourea from 2-20 times the weight of copper ion. Suitable copper salts for providing the copper ions are copper sulphate, cupric nitrate, cupric acetate and cupric chloride. Treatment is effected at ambient temperatures and preferably at pressures above atmospheric.
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Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compound selected from thiourea, 1, 3 dimethyl thiourea, 1, 3 diethyl thiourea, alkyl thiourea, ethylene thiourea, 1, 3 diisopropyl thiourea, the thiorea compound being present in an amount equivalent to an amount of thiourea from 2-20 times the weight of copper ion. Suitable copper salts for providing the copper ions are copper sulphate, cupric nitrate, cupric acetate and cupric chloride. 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Cleaning ferrous surfaces. DOW CHEMICAL CO. Oct. 17, 1967, No. 47177/67. Heading C7E. Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compound selected from thiourea, 1, 3 dimethyl thiourea, 1, 3 diethyl thiourea, alkyl thiourea, ethylene thiourea, 1, 3 diisopropyl thiourea, the thiorea compound being present in an amount equivalent to an amount of thiourea from 2-20 times the weight of copper ion. Suitable copper salts for providing the copper ions are copper sulphate, cupric nitrate, cupric acetate and cupric chloride. Treatment is effected at ambient temperatures and preferably at pressures above atmospheric.</description><subject>CHEMICAL SURFACE TREATMENT</subject><subject>CHEMISTRY</subject><subject>CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING MATERIAL WITH METALLIC MATERIAL</subject><subject>COATING METALLIC MATERIAL</subject><subject>DIFFUSION TREATMENT OF METALLIC MATERIAL</subject><subject>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</subject><subject>METALLURGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1969</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAOSs3NL0vMUchPU3BLLSrKLy1WCC7NSctMSVVwSS3IL84sKeZhYE1LzClO5YXS3Azybq4hzh66QPn41OKCxOTUvNSSeHcnQ0NTQzMTS0djwioANJAlVA</recordid><startdate>19690514</startdate><enddate>19690514</enddate><creator>FRED NORMAN TEUMAC</creator><scope>EVB</scope></search><sort><creationdate>19690514</creationdate><title>Removal of Ferrous Sulfide Deposits</title><author>FRED NORMAN TEUMAC</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_GB1151649A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1969</creationdate><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</topic><topic>METALLURGY</topic><toplevel>online_resources</toplevel><creatorcontrib>FRED NORMAN TEUMAC</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>FRED NORMAN TEUMAC</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Removal of Ferrous Sulfide Deposits</title><date>1969-05-14</date><risdate>1969</risdate><abstract>1,151,649. Cleaning ferrous surfaces. DOW CHEMICAL CO. Oct. 17, 1967, No. 47177/67. Heading C7E. Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compound selected from thiourea, 1, 3 dimethyl thiourea, 1, 3 diethyl thiourea, alkyl thiourea, ethylene thiourea, 1, 3 diisopropyl thiourea, the thiorea compound being present in an amount equivalent to an amount of thiourea from 2-20 times the weight of copper ion. Suitable copper salts for providing the copper ions are copper sulphate, cupric nitrate, cupric acetate and cupric chloride. Treatment is effected at ambient temperatures and preferably at pressures above atmospheric.</abstract><oa>free_for_read</oa></addata></record>
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subjects	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
title	Removal of Ferrous Sulfide Deposits
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